you might be better off just getting a new set of sights from somebody like lakeline llc . the plastic rear sights
on my g2c , pt111, and tx 22 are all the same and cheesy awful -------------just saying
Lakeline LLC
Sorry, but most people wont get the benefit they think from replacing sights.
Learning proper grip, and technique will do much more than throwing money at parts that training will help far more with.
If you aren't at least hitting the target out of the box with no adjustments, then still get the same poor results after adjusting them to the extreme in an attempt to correct it it is time to realize the error is with the shooter.
Unfortunately most people think that cause they play Call of Duty on X-Box they are suddenly Seal Team 6 level operators.
Consistently gripping the pistol and squeezing the trigger the same way have far more affect on your ability to hit the target than your sights ever will.
Most won't take the time, practice, and ammo required to get good at shooting. They would rather shoot a box of 50 rounds, adjust the sights, complain about what garbage Gun X is online, buy the latest wonder sight, or trigger kit and when that doesn't work they sell it for the next wonder gun they hear about.
Any great athlete will say practice is key because much of it is muscle memory.
The OP would be better served by dry firing with a laser training cartridge.